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        <p>请你，请你一定一定要温柔对待她”<br>长大了以后，你才会知道，在幕然回首的刹那<br>没有怨恨的青春才会了无遗憾<br>如山岗上那轮静静的满月~</p>
<hr>
<p>首发在secquan，直接拿过来了</p>
<a id="more"></a>
<h3 id="没有验证码"><a href="#没有验证码" class="headerlink" title="没有验证码"></a>没有验证码</h3><p>最简单的爆破，页面基本如下图</p>
<p><img src="http://secquan.zzyuncheng.com/aec808633832f3fe65ab0eb996690543.png-quanzi" alt="file"></p>
<p>这个就是直接bp一把梭，剩下看人品了..</p>
<p><img src="http://secquan.zzyuncheng.com/4be0332f778544cff8f8c264aa866269.png-quanzi" alt="file"></p>
<p>长度相同看状态，状态相同看长度，不同的那个看响应。要是提示登录成功，那他就是你的账号密码了。</p>
<h3 id="验证码-on-server"><a href="#验证码-on-server" class="headerlink" title="验证码(on server)"></a>验证码(on server)</h3><p>这类验证码是指验证码存放在server上，大多数现在是图片形式的居多，然后通过各类方法调用、验证。</p>
<p>常见的问题有：</p>
<p>（1）只验证参数存在与否，没有验证验证码的内容值：任意验证码都可以绕过，那就随机填写即可。<br>（2）特殊值可以绕过验证：例如空值或者所谓的万能验证码000000。<br>（3）没有验证验证码参数但是验证了内容值：去掉参数可以绕过<br>（4）验证码不过期，没有及时销毁会话导致验证码复用(这个是最常见的)</p>
<p>下面以（4）为例</p>
<p>一个类似的前端登录界面</p>
<p><img src="http://secquan.zzyuncheng.com/be3a78fc21d35589103ca1a09f32c6ca.png-quanzi" alt="file"></p>
<p>其他步骤与平时爆破时一样的，只是多了一个输入验证码的过程，即输对一次，便可一直爆破</p>
<p><img src="http://secquan.zzyuncheng.com/a9416bf975a933575423c41d94bcb5e4.png-quanzi" alt="file"></p>
<h3 id="验证码-on-client"><a href="#验证码-on-client" class="headerlink" title="验证码(on client)"></a>验证码(on client)</h3><p>这个其实也是没什么的，毕竟所有的前端验证都是不安全的。<br>一个典型的js的验证码代码如下</p>
<p><img src="http://secquan.zzyuncheng.com/c42bb4d893d4c8d7e99e9ea3e2864815.png-quanzi" alt="file"></p>
<p>至于绕过嘛，就更简单了，直接禁用js就ok了</p>
<p><img src="http://secquan.zzyuncheng.com/63bb11048c00e6a8ea9d5fb4d4818ab0.png-quanzi" alt="file">..</p>
<h3 id="Token绕过-验证码输出在html中的情况"><a href="#Token绕过-验证码输出在html中的情况" class="headerlink" title="Token绕过(验证码输出在html中的情况)"></a>Token绕过(验证码输出在html中的情况)</h3><p>顾名思义，令牌的意思，在预防csrf中出现的比较多，常见如下</p>
<p><img src="http://secquan.zzyuncheng.com/ef3f1b265321063c68b19ed3cd9ecae0.png-quanzi" alt="file"></p>
<p>经过查看源代码发现token是在前端的一个隐藏的表单里的，并且每次刷新都会改变这个值</p>
<p><img src="http://secquan.zzyuncheng.com/92295d405b238659c996374e047ccdaf.png-quanzi" alt="file"></p>
<p>这种其实不怎么常见，但是也是很好绕过的..</p>
<p>我们下面使用burpsuite的宏绕过</p>
<p>第一步：录制宏<br>宏的管理界面位于Project Options → Sessions,点击Add,新建一个宏。</p>
<p><img src="http://secquan.zzyuncheng.com/5a6139e2483d5a47af13e5b2acb9f7bf.png-quanzi" alt="file"></p>
<p>从HTTP请求记录中选择获取爆破 TOKEN的请求，选择后确定。</p>
<p><img src="http://secquan.zzyuncheng.com/80f16a5c346216a2c5e3e052017856e5.png-quanzi" alt="file">.</p>
<p>之后进入宏编辑界面，输入宏的名字，名字可随便写。宏设置页面，指定参数的位置。点击右下角Add进行参数添加。</p>
<p><img src="http://secquan.zzyuncheng.com/d6c5fdc5a56c7fc74079de3bc3c2be53.png-quanzi" alt="file"></p>
<p>输入参数名称（需和密码修改请求中的参数名一致），使用指定开始和结束位置的方式，在请求响应内容中找到token，鼠标选择保持高亮，点击确定。</p>
<p><img src="http://secquan.zzyuncheng.com/5eca96a6c6baa9d0dcfa1511f66550e8.png-quanzi" alt="file"></p>
<p>会话处理规则处，点击Add，添加一条新的规则。</p>
<p>填写规则描述（使用便于区分的文字内容），添加一个动作，在请求之前运行一个宏。</p>
<p><img src="http://secquan.zzyuncheng.com/93e832c1799275dc9b347a795c610748.png-quanzi" alt="file"></p>
<p>完成动作编辑后，回到会话操作规则编辑界面，选择Scope,设置这个宏的作用域。</p>
<p><img src="http://secquan.zzyuncheng.com/5459ef4a40ad76c4a23c5fe67a94fddc.png-quanzi" alt="file"></p>
<p>这时我们已经可以自己去获取token了</p>
<p><img src="http://secquan.zzyuncheng.com/26419b9ff4919c3a9e64bac86e616a48.png-quanzi" alt="file"></p>
<p>爆破也就可以正常进行了</p>
<p><img src="http://secquan.zzyuncheng.com/8a76b9bfe4ab5cc992ac97959f91a72a.png-quanzi" alt="file"></p>
<p>其实这类的话还是py比较好…一个re、一个request就搞定了…</p>
<h3 id="总结"><a href="#总结" class="headerlink" title="总结"></a>总结</h3><p>新人向，写的不对的地方还望各位师傅斧正</p>

      
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  <p><span>本文标题:</span><a href="/爆破时验证码相关问题/">爆破时验证码相关问题</a></p>
  <p><span>文章作者:</span><a href="/" title="访问 冷逸 的个人博客">冷逸</a></p>
  <p><span>发布时间:</span>2019年02月17日 - 20:02</p>
  <p><span>最后更新:</span>2019年02月17日 - 20:02</p>
  <p><span>原始链接:</span><a href="/爆破时验证码相关问题/" title="爆破时验证码相关问题">https://lengjibo.github.io/爆破时验证码相关问题/</a>
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